Fiction ain't about "real life", art should always be about taking us out of this world and making us feel good.
I disagree with a lot of your posts in this thread, but I agree with this one. It baffles me why people watch entertainment that is basically voyeurism into another person's life. Nothing extraordinary, just pretty much the same crap I live with every day. It has to be set apart somehow.
I don't need a happy ending though. A.I. would have been better if David was left at the bottom of the ocean forever, for instance. But it has to has to have something to take it beyond the mundane of everyday life. I want to be entertained; if I want to ponder about life I'll watch the news or read a spiritual book.
I hope Harrison comes back. He's the best actor of the three, and Indy 4's failure was not his fault. He might not do it though, as he always wanted to move on from that, his first major role, and develop more. But he's getting old and that could be a great way to wind down his career.
I'm more worried about the music. I was afraid John Williams would die before he finished Ep III. I'm still disappointed by how much music they recycled in II and III. He's probably not up for it, but whoever they get had better be a kindred spirit to him.
Anyway, as a sidebar, if anyone wants to see the prequels redeemed, I highly recommend tracking down the Phantom Edits of I and II. The editor does away with the fluff in both and the horrific execution of Anakin and Padme's romance, actually saving the films in many ways. (It's not just taking out Jar Jar, as he does serve a purpose.)
I think stories like Lord of the Rings, the Chronicles of Narnia, Harry Potter, Star Wars (current) and others are great because they take you out of your world, give you hope and lift you up. Star Wars is all about the redemption of Anakin Skywalker from his fall. The sequels should be about the continuation of his legacy, the Skywalker legacy and the journey of the Skywalkers to maintain the balance that Anakin was prophesied to bring. That doesn't mean Luke has to found a whole order, but it should mean that Luke has to have a child. He shouldn't die alone and without heirs. Good has triumphed, but evil still exists and the sequels should be about the Skywalkers & Solo legacies to maintain that order through The Force & through Diplomacy.
The Empire is dead with the Emperor and I could understand ignoring the "Remnants" of the post-ROTJ books. They could be done without. However, there needs to be a unifying government born out of the Rebel Alliance, and the "New Republic" should be just that. It shouldn't be a fleeting group though, and its defeat or subjugation within a century of its birth in the books should also be done away with.
The Yuuzhan Vong provide a great new enemy. The whole idea of the "emperor's clones" and "third death star at Kessel" or of a new "Sith Empire" are simply rehashes of the same old stories which should have been resolved at ROTJ. The Yuuzhan Vong are enemies devoid of the force, and who cannot be detected or read by the force, and who's presence doesn't necessarily disrupt the balance of the Force (which should be maintained after ROTJ per the prophecies about Anakin).
Depending on when they set the movies, Han Solo could be dead, but it should only be of old age. Chewbacca could be caring for an elderly Leia while her and Han's children enter adulthood. They can also forget Chewbacca's whole death thing, that'd be okay as well.
This is where they should more directly insert EU canon. Mara Jade should be included here. Mara should be Luke's wife, but Luke, at the point of these movies should be an elderly man, possibly a widower. They should have only one son, Ben Skywalker, who, like the Solo children, is entering adulthood. In the first movie, much like Ben, Luke "passes the torch" to his son, the third Skywalker, who then heads off to adventure with the Solo kids, 3PO & R2. At this point, they could have Luke become one with the force in the presence of his family, and end his death with him standing "force ghost" alongside Ben, Yoda, Mara and Anakin as a young Luke. This would be the conclusion of the "old generation", with Leia living the rest of her life as a senator in the New Republic (with Chewy, 3PO and R2 at her side) and eventually passing on, unifying with the force as her brother & father did. The only remnants of the original 6 would be Chewy, 3PO & R2. Chewy's life-debt could be retired with the death of Leia, and he could be sent off to his family, maybe have one of his children adventure with the Solo children. 3PO & R2 would aid Ben Skywalker (and occasionally the Solos) in his adventures.
This would all be the first movie, allowing the next two to be all about the children.
This would be, in my mind, an acceptable way to "forget the EU" while also nodding and respecting the EU, and staying true to the Star Wars saga.